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Rob Dean's thought's on the subject...
2) Isn't a dynamo draggy? Well, Please excuse the maths, but if you rode at 20mph for an hour the light would pull about 6W from your legs during this time, this is equivalent to approximately 5.2kcal. There are approximately 72kcal in a McVites Digestive biscuit, enough to power your light for just under 14hrs and that's assuming you pedal down the hills and around every corner! So yes, it does draw a tiny bit of power, but I certainly can't tell the difference and it's a damn good excuse to eat an extra biscuit every few rides ;-)
I use my Revo on and off road, couldn't be happier! Plug-in RedEye rear light is awesome too, no pissing around with batteries. Believe there may be some sneaky prototype Revos with USB-out knocking around, would simplify the charging side of things, at the moment you'd need some other device connected/wired in - Sinewave Revolution, Cinq Plug etc.
Saying that, Mike Hall did TransAm with a 6pack and Joystick as cache-battery, depends how long you're planning on stopping/if you get chance to top up power along the way...
atk-
For lights you need to consider how long the nights are and how bright the moon is.
You can get away with using a front light on be seen mode and see the road fine in some places.
So a setup that works one place might not be right in another. -
Cheers, I'll have a read of that. I don't plan on stopping, certainly not for any length of time that would let me charge stuff. Where'd you hear about the Revos with USB? Could I create a similar setup using the dyno to either directly charge the Six Pack or the Garmin(s)?
skinny
hippy
X-Post from PBP thread...
Right, on a serious note, the bloke I chatted to during the 600 was using a dyno hub to power his lights and electronics. Should I do the same thing for PBP?
I own an Exposure Six Pack which might last the two nights (1200k)?
ultimatesportsengineering.com/exposure-lights/cycle-lights/six-pack-mk4
If I went full battery mode I'd need probably 2 x GPS, 2 x extended Garmin batteries, 1 front light and maybe an extender battery for it, rear lights could just be AA or AAA types.
I'm getting a new set of wheels built anyway so slipping a dyno in would cost me the front hub and the phone adapters but how much would it slow me down? Would it actually power all my shit?
Could I recharge the Six Pack using the dynamo or is it better to use specific dynamo lights?
According to this I'd be adding a couple of watts with lights off and 8 or so with lights on. But what about charging stuff? Can it be used to trickle charge an external battery and then released for lighting or GPS?